The school's security guard dies, leaving Hae-sung a notebook belonging to his missing father. The revelation is shocking, and he storms the NIS for answers. The answer pushes him away from the mission, and he takes time off. However, he resolves to continue but returns only to discover Soo-ah witnessed it all.
22년 전 실종된 아버지가 본인과 같은 임무를 하고 있었단 것을 알게 된 해성. 충격과 배신감에 임무 중단을 선언하는데.
